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How to test an alternator with the voltage regulator in the PCM on a 1990 chrysler new yorker? I installed a new alternator but the battery is still not charging. There is battery voltage at the two small terminals and one large terminal with the ignition on but car not running.

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Posted on Jan 02, 2017

relaga58
  • 158 Answers

SOURCE: charging problem 1990 4runner v6

must be voltage regulater

Posted on May 07, 2009

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SOURCE: 1990 new yorker alternator replacement

You are right about removing the motor mount. You have to support the engine with a jack. Use a piece of plywood between the jack and the oil pan. Remove the motor mount and you should be able to lift the engine up about 2-3 inches with the jack. Remove the serpentine belt and then you should have enough room to remove the alternator.

Posted on Jul 02, 2009

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SOURCE: have a 1997 dodge stratus, ive changed out the

change your battery it should be around 14 volts if battery is good and alt is working properly

Posted on Sep 18, 2009

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SOURCE: Will not charge

you will get some funny answers from some of these "experts " The symptoms suggest to me with out much doubt that the regulator is not doing its job correctly ,consistently.Iwould take it to an AUTO ELECTRICIAN and get it tested in situ.... there is only 4 things it can be , wireing ---battery---alternator-----regulator and of those the reg. is the only one that chops and changes. it will cost little for a sparky to check the reg ,. AND I WOULD LIKE TO KNOW THE OUTCOME

Posted on Oct 22, 2009

swoop611
  • 488 Answers

SOURCE: alternator not charging battery on 2007 f-150

Replace the Alternator. Sounds like the internal brushes have worn out as you appear to have the correct feeds to it. If you are tempted to open the alt to have a look at the brushes, be careful as incorrect assembly can cause serious damage as can incorrect re-assembly. You can simply replace the brushes but I would advise against it as the copper rings the brushes rub on (the slip rings) will also be worn and require replacement, this is difficult if you do not have the experience. Also, the bearings should also be replaced as they will no doubt be worn too. Altogether a specialist job, so grab yourself an new or exchange alternator. if you have to get a second hand unit, have it tested BEFORE you fit it..

Posted on Dec 27, 2009

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Nov 18, 2012 - SOURCE: 1990 new yorker alternator replacement. You are right aboutremoving the motor mount. You have to support the engine with a jack.
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Oct 20, 2015 | 1990 Chrysler New Yorker

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How do i fix my voltage regulator 98 dodge ram 5.2 new battery new pcm?


Voltage regulator is internal to the Alternator. You have to replace the Alternator.

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1 Answer

Why isnt my 1990 chrysler new yorker fifth avenue altenator not charging battery


Could be a bad battery or a bad alternator, or both.

A bad battery can hinder the performance of an alternator and a faulty alternator can slowly kill a battery.

Check your battery fluid levels and acidity concentration. Do not replenish fluid level with plain tap water as it will finally spell doom on the battery.

If you can still drive the car, take it to your nearest auto parts dealer. They usually have basic maintenance checkups for free. One of them is testing the charging system and they will tell you right up if the problem lies in the battery or the charging system.

A bad battery is a blind alley. If it's bad then replace it.

If you still want to hack at it at home, and all is OK with the battery, there is an old way of telling whether the alternator is working properly. But it's kind of dangerous if you do it wrong.

With the engine running, place the flat part of a flat head screwdriver on the side of the alternator, opposite to the v-belt or serpentine pulley. I'm talking about the center of the back cover of the alternator. Make sure you do not touch any electrical connections with the screwdriver as you may cause a short-circuit and experience fireworks. The tip of the screwdriver should be safely away from any spinning pulleys and belts.

If you feel a magnetic 'pull' on the screwdriver from the alternator body at the center of the back cover, it is a good sign that it is actually doing its job, charging that is. But only that.

An alternator "alternates" between powering all things electrical in your car and charging the battery. There is a small, replaceable thing called a "voltage regulator" that when it goes bad, it kinda gives you battery problems. You can buy one and replace it yourself or you can have someone do the dirty stuff.

In any case, a good, professional, clean, and thorough checkup is always the best option.

Hope it helps.

Jun 11, 2014 | 1990 Chrysler New Yorker

1 Answer

I am getting P0622 on my Chrysler Town and Country. I have a brand new battery and the alternator tested good at Auto Zone. I got 12.4 volts at the battery with the van off and between 7 and 8 volts...


if you getting 12.4 volts with no power load and engine goes down to 7-8 volt should be between 13-14 volts on idle would say the voltage regulator has gone.some are replaceable but most are not so you will need a new alternator or a secondhand one that is know to be working.

Sep 15, 2013 | 2001 Chrysler Town & Country

1 Answer

1998 Chrylser Sebring Voltage regulator


All I can tell you is that when the regulators in the PCM mess up, the alternator usually will not charge at all.

I do not know what you mean by "all over the place", but I can also tell you that if your charging system voltage is really erratic, like 12 volts one minute and nearly 15 volts the next, it is usually caused by a shorted (oe sulfated) battery cell. A shorted cell will cause the alternator to "full field" and make the whining noise you are describing. Also, shorted battery cells are what usually causes the early death of many alternators.

Jan 04, 2012 | 1998 Chrysler Sebring

1 Answer

WHERE IS THE TENSIONER PULLY ON 1990 CHRYSLER NEW YORKER 3.3


The tension pully is located below the alternator, and when the alternator is pushed toward the firewall, then the tentioner is released

Jun 10, 2010 | 1990 Chrysler New Yorker

1 Answer

Alternator wont charge the battery put a new one on still wont


When replacing Alternator on This Vehicle Voltage Regulater Must Be Replaced Also.

Jun 02, 2009 | 1990 Chrysler New Yorker

1 Answer

I replaced the alternator but wont charge i had it checked before


volta regulater is in the pcm ( power control modual ) you need a pcm or a external voltage reg . the reg is what controls the alt out put

Jun 02, 2009 | 1988 Chrysler New Yorker

1 Answer

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1 Answer

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